This add-on makes it very easy to get access to Jaiku's custom RSS tags known as Jaiku RSS. Data includes the comment count, user nick, first name, last name, avatar, time since. Also there is a 'is_jaiku' available in every item, so you can base format behavior on that. The SimplePie Object is also extended. This was done to filter out the jaikus from the other feeds in the Jaiku RSS. There is a screencast available that shows how a simelar Add-on was created: Creating the Digg SimplePie Add-on.